Pupil.Size vs ETPhone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pupil.Size
This utility app uses your device's camera to measure pupil diameter in real time. It's designed for quick and easy pupil size analysis.
- Real-time pupil diameter measurement
- Uses device camera
- Pupil size analysis
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Pupil.Size is an application which can measure the diameter of a pupil in real time using iPod touch camera.
ETPhone
This application enables real-time gaze computation and recording for eye tracking data collection using a compatible wearable device. It offers control over camera settings, participant calibration, and data recording to an SD card. Collected data can be easily transferred for detailed analysis on a PC.
- Real-time gaze computation
- Gaze data recording
- Camera gain and quality control
- Participant calibration
- SD card recording control
- Data download for PC analysis
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Argus Science is pleased to release the latest version of the ETPhone App for use with the Argus Science ETVision wearable eye tracker. This Release builds upon the original ETPhone App by adding real-time gaze computation and recording directly on your iOS Phone or Tablet, allowing increased flexibility and control for eye tracking data collection. With this latest ETPhone Release you may name files, control gain and quality of the ETVision cameras, calibrate participants, record gaze data and control recording to an SD card inserted in the ETVision controller. After data is collected, it is easy to download the gaze data to a PC with Argus Science’s ETAnalysis program which allows the researcher to perform typical gaze analysis functions such as Fixation definition, Pupillometry and blink criteria as well as automated area of interest creation to name a few.
Screenshots
Verdict
The clearest difference is rating: ETPhone at 3.0 against Pupil.Size's 1.0. Pupil.Size's advantage is update cadence (every 2 months vs every 16 months) and iOS requirement (11.0 vs 16). On price, review sentiment, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ETPhone holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews split almost evenly too, at 0% and 0% positive.
Pupil.Size ships an update every 2 months, ETPhone every 16 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.
| Parameter | Pupil.Size | ETPhone |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (4 ratings) | 3.0 (6 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 4 | 6 — better |
| Update frequency | Every 2 months — better | Every 16 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 16 |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | SCALAR CORP. | Argus Science, LLC |
Customer experience
Pupil.Size
ETPhone
In-app purchases
Pupil.Size
No in-app purchases
ETPhone
No in-app purchases
